Non-contact optical gauge



FIG. 1 is a top plan, front and right side perspective view of a non-contact optical gauge showing my new design, being drawn on an enlarged scale;

FIG. 2 is a right side elevational view, being drawn on an enlarged scale;

FIG. 3 is a top plan view;

FIG. 4 is a bottom plan view;

FIG. 5 is a front elevational view; and

FIG. 6 is a rear elevational view thereof, FIGS. 3-6 being drawn on a reduced scale. 

The ornamental design for a non-contact optical gauge, as shown and described. 